error[E0382]: use of moved value: `a`
  --> $DIR/issue-75904-move-closure-loop.rs:10:9
   |
LL |     let mut a = NotCopy;
   |         ----- move occurs because `a` has type `NotCopy`, which does not implement the `Copy` trait
LL |     loop {
   |     ---- inside of this loop
LL |         || {
   |         ^^ value moved into closure here, in previous iteration of loop
LL |             &mut a;
LL |             a;
   |             - use occurs due to use in closure
   |
note: if `NotCopy` implemented `Clone`, you could clone the value
  --> $DIR/issue-75904-move-closure-loop.rs:5:1
   |
LL | struct NotCopy;
   | ^^^^^^^^^^^^^^ consider implementing `Clone` for this type
...
LL |             a;
   |             - you could clone this value

error: aborting due to 1 previous error

For more information about this error, try `rustc --explain E0382`.